TWI675162B - Screw axial clearance adjustment mechanism - Google Patents

Abstract

A screw axial clearance adjustment mechanism having a bracket and a screw rotatably mounted on a bracket A frame and a threaded bearing are sleeved on one end of the screw, the threaded bearing is screwed into a first mounting hole on the bracket, and one end of the threaded bearing abuts against a stopper on the screw. Therefore, the user can rotate the threaded bearing, make the threaded bearing exert a force on the screw through the baffle, and then achieve the effect of adjusting the axial clearance of the screw, which has the advantage of easy assembly and use.

Description

Screw axial clearance adjustment mechanism

The present invention relates to transmission technology, and specifically relates to a screw clearance adjustment mechanism, which has the advantage of being easy to assemble and use.

The screw is a commonly used transmission element, and is mounted on a base to provide rotary motion. In order to achieve the purpose of precise transmission, the screw is provided with two nuts screwed on the screw, and a spring penetrating the screw and located between the two nuts, one of the nuts abuts against The base pushes the nut by the spring force. The user can adjust the axial clearance of the screw by adjusting the spacing between the nuts, so that the transmission process is smoother and the noise is reduced.

However, in addition to increasing the number of components, the aforementioned nuts and springs are also difficult to assemble, the cost of parts and assembly are high, and they cannot be applied to micro-machines.

The purpose of the present invention is to provide a mechanism for adjusting the axial clearance of a screw, which has the advantages of simple structure and easy installation and use.

Therefore, the present invention provides a screw axial clearance adjustment mechanism including: a bracket provided with a first mounting hole, and the first mounting hole is a screw hole; a screw having a threaded portion and a baffle, and The screw passes through the first mounting hole and is pivoted in the bracket; and a thread bearing is hollow and sleeved at one end of the screw located in the first mounting hole. The screw is screwed into the first mounting hole, so that one end of the screw bearing abuts against the stopper.

This allows the user to control the rotation of the threaded bearing, so that the threaded bearing is displaced toward or away from the interior of the bracket, and the screw is moved along the axial direction through the force of the baffle, thereby achieving the effect of adjusting the axial clearance of the screw. . The screw axial clearance adjustment mechanism of the present invention has a small number of parts and is easy to assemble, and is also very easy to operate, and the user can even operate it with bare hands.

10‧‧‧ Bracket

11‧‧‧ stand

12‧‧‧ Positioning plate

13‧‧‧First mounting hole

14‧‧‧Second mounting hole

15‧‧‧perforation

16‧‧‧Positioning Bearing

17‧‧‧ blind hole

18‧‧‧Guide Post

20‧‧‧Screw

21‧‧‧ shaft

22‧‧‧Thread

23‧‧‧Groove

24‧‧‧ files

30‧‧‧Threaded bearings

31‧‧‧Thread

32‧‧‧ flange

33‧‧‧Head

40‧‧‧ slider

D‧‧‧distance

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an exploded view of an embodiment of the present invention.

FIG. 3 is a sectional view of an embodiment of the present invention.

In order to clearly illustrate the structure of the present invention and the technical effects achieved, it is described below with reference to the drawings. The screw axial clearance adjustment mechanism of the embodiment provided by the present invention includes a bracket 10, a screw 20, and a threaded bearing 30. The specific structures of the components are described as follows: Please refer to FIGS. The bracket 10 has a vertical plate 11 and two positioning plates 12 extending outward from the opposite sides of the vertical plate 11 in the same direction, so that the bracket 10 is generally U-shaped. The positioning plates 12 are provided with corresponding A first mounting hole 13, a second mounting hole 14 and two perforations 15, wherein the first mounting hole 13 is a screw hole with a thread on the inner peripheral surface, and the second mounting hole is a perforation with a smooth surface on the inner peripheral surface. In addition, the bracket 10 also has a positioning bearing 16 installed in the second mounting hole 14. A blind hole 17 is provided in the center of the positioning bearing 16, and the opening of the blind hole 16 faces the inside of the bracket 10.

The screw 20 is mainly a rod body 21 and can pass through the first mounting hole 13 and the second mounting hole 14. One end of the screw 20 is inserted into the blind hole 17 of the positioning bearing 16 to rotate relative to the bracket 10. The middle portion of the rod body 21 is provided with a threaded portion 22, and at the same time, one end of the rod body 21 near the first mounting hole 13 is provided. There is a groove 23. In this embodiment, the groove 23 is provided on the edge of the threaded portion 22, and a person skilled in the art can adjust the setting position of the annular groove 23 as needed. In addition, the screw 20 is provided with a C-shaped first baffle 24 that is engaged and fixed in the groove 23, so that the screw 20 and the baffle 24 will be displaced synchronously.

The screw bearing 30 has a hollow cylindrical shape and can be sleeved on one end of the screw 20 located in the first mounting hole 13. The outer surface of the threaded bearing 30 has a threaded portion 31 that can be screwed into the first mounting hole 13 and a flange portion 32 having an outer diameter larger than that of the threaded portion 31. In this way, when the threaded bearing 30 is installed in the first mounting hole 13, one end of the threaded bearing 30 will abut against the stopper 24, so that the position of the screw 20 can be adjusted by force. In addition, the flange portion 32 also has two heads 33 protruding outward, which is convenient for a user to rotate the threaded bearing 30 with bare hands or using other tools.

In addition to the aforementioned elements, this embodiment also has a slider 40 screwed to the threaded portion 22 of the screw 20 for converting the rotary motion of the screw 20 into a linear motion. The bracket 10 is also provided with a guide post 18 to pass through The two perforations 15 are fixedly arranged to guide the slider 40 while preventing the slider 40 from rotating.

The assembly procedure of the axial clearance adjustment mechanism for the screw of this embodiment will be described here. First, the stopper 24 is mounted on the screw 20, and then one end of the screw 20 is sequentially passed through the first mounting hole 13 and the slider 40, and then one end of the screw 20 is rotatably positioned on the positioning bearing 16, and finally the threaded bearing 30 is sleeved on the other end of the screw 20, and the rotary screw bearing 30 is screwed to the first mounting hole 13 so that the screw 20 is installed between the screw bearing 30 and the positioning bearing 16, so that the screw 20 can stably rotate . Therefore, the entire assembly process is completed, and the process is simple and fast.

After the assembly is completed, one end of the screw 20 inserted into the positioning bearing 16 is tightly matched with the blind hole 17, so that a slight relative movement can be generated. Since one end of the threaded bearing 30 abuts against the stopper 24, the user can use the flange portion 32 and the head 33 of the threaded bearing 30 to rotate the threaded bearing 30 clockwise or counterclockwise. Displace the threaded bearing 30 toward the interior of the bracket 20 toward or away from it, and at the same time exert a force on the screw 20 along the axial direction through the baffle 24 to change the distance D between the baffle 24 and the positioning plate 12, As shown in Figure 3, the purpose of adjusting the axial clearance of the screw is achieved.

It can be seen that the assembly procedure of the present invention is quite simple, and the user can easily rotate the screw bearing 30 to finely adjust the position of the screw 20, thereby changing the axial clearance of the screw.

Claims (9)

A screw axial gap adjustment mechanism includes: a bracket provided with a first mounting hole, and the first mounting hole is a screw hole; a screw has a threaded portion and a baffle, and the screw passes through the The first mounting hole is pivotally arranged in the bracket; and a threaded bearing, which is hollow cylindrical and sleeves one end of the screw located in the first mounting hole, the outer periphery of the threaded bearing has a threaded portion to be screwed to the first A mounting hole makes one end of the threaded bearing abut the baffle. The screw axial clearance adjustment mechanism according to claim 1, wherein the screw bearing has a flange portion having an outer diameter larger than the screw portion. The screw axial clearance adjustment mechanism according to claim 2, wherein the flange portion has two head portions protruding outward. The screw axial clearance adjustment mechanism according to claim 1, wherein the screw is provided with a groove, and the baffle is C-shaped and fixed in the groove. The screw axial clearance adjustment mechanism according to claim 1, wherein the bracket has a vertical plate and two positioning plates extending outward from opposite sides of the vertical plate in the same direction, and the two positioning plates are respectively provided with corresponding The first mounting hole and a second mounting hole, and the inner peripheral surface of the second mounting hole is a smooth surface. The screw axial clearance adjustment mechanism according to claim 5, wherein the bracket has a positioning bearing installed in the second mounting hole, so that the screw is installed between the screw bearing and the positioning bearing. The screw axial clearance adjustment mechanism according to claim 6, wherein a blind hole is provided in the center of the positioning bearing for the screw to be inserted. The screw axial gap adjustment mechanism according to claim 5, wherein the positioning plates are respectively provided with two perforations, and the bracket is provided with a guide post passing through the perforations and fixedly arranged. The screw axial clearance adjustment mechanism according to claim 8, further comprising a slider screwed to the screw.